Abstract : This patent describes a meter box assembly capable of displaying signal magnitudes. The meter box assembly is in the form of a housing which encloses therein a plurality of circuits, each of the circuits being connected to a display unit on the housing. Each meter box assembly circuit combines in a novel arrangement a meter, switch module, voltmeter circuit and strain gage circuit in order to display in an accurate fashion voltages external to the meter box assembly or to display the voltage output of a strain gage transducer.